PHOENIX — The Arizona Diamondbacks arrived at Chase Field on Monday afternoon for a light workout and heavy anxiety.After a full afternoon of scoreboard watching, their fears were confirmed. There will be no postseason for the defending National League champions.The Atlanta Braves and New York Mets split their doubleheader on Monday in Atlanta, meaning both those teams will head to playoffs while the Diamondbacks were the odd team out. All three finished the regular season with an 89-73 record, but the Mets and Braves both owned tiebreakers over Arizona because they won the season series.In the end, there was nothing to do but watch the season slip away on TV. Diamondbacks ace Zac Gallen was playing catch on the field as the final out was recorded before trudging off the field and to the clubhouse.“I was planning on playing tomorrow,” Gallen said. The Mets-Braves doubleheader on Monday was scheduled one day following the expected end of the regular season after Hurricane Helene washed out two of their games in Atlanta last week. It wasn’t an ideal situation for anyone involved.“It’s unfortunate, but you can’t control the weather,” Gallen said. “Who knew a hurricane was going to happen? That’s moreso the bigger picture — people are losing their lives and homes. For me to get mad about a natural disaster would be a little tone deaf.“The more disappointing part is that we — to a certain extent — controlled our own destiny an …